I think in time, yes, it will all blend together. However, my dentist told me that the over the counter products are just as effective and very safe - why are you scared? I have always heard good things about whitening, nothing negative. At first your gums may be a little tender, and in that case you do it every other day. You will love your teeth, white teeth are very, very attractive. I have been whitening for four years now. I began with my dentist and had trays made, but now I use the crest white strips, easier and costs less. Plus, he told me it was safe. I had to sleep in my original trays, and the crest strips are so much faster and easier. I never thought I would have bright white teeth. Ever since I was a child, mine were discolored (self-conscious) now, everyone comments on my teeth. I have not had any dental trouble, cavities, gum problems, etc.